JLG T500J Operator Manual - Manual (Page 34)

SECTION 3 - TOWING
3-2 – JLG Lift – 3121197
Tongue Height
Proper tongue height is critical to maintaining stability during
towing. The trailer should always be as level as possible while
towing. Due to varying vehicle height, the coupling height may
need adjusted with a raised or dropped ball mount.
THE TRAILER TONGUE MUST BE LEVEL BEFORE TOWING. ADJUST THE COUPLER OR
TOW VEHICLE HITCH TO ACHIEVE THIS HEIGHT.
Coupler and Ball
The coupler on the trailer connects to the ball attached to the
hitch on the tow vehicle. Before each tow, coat the ball with a thin
layer of automotive bearing grease to reduce wear and ensure
proper operation; and check the locking device that secures the
coupler to the ball for proper operation.
If you see or feel evidence of wear, such as flat spots, deforma-
tions, pitting or corrosion, on the ball or coupler, immediately
have your dealer inspect them to determine the proper action to
prevent possible failure of the ball and coupler system. All bent or
broken coupler parts must be replaced before towing the trailer.
The coupler must operate properly and automatically snap into
the latched position. Oil the pivot points, sliding surfaces, and
spring ends with SAE 30W motor oil. Keep the ball pocket and
latch mechanism clean. Dirt or contamination can prevent proper
operation of the latching mechanism.
When replacing a ball, the load rating must match or exceed the
GVWR of the trailer.
Tongue Jack
NOTE: To avoid damaging the handle while trailering in the horizontal
position, secure the handle to the jack with a bungee cord or
rope.
The jack is designed to be swiveled into a horizontal or storage
position. In both the vertical and horizontal positions, the
plunger must be securely positioned in the mating hole in the
mounting bracket. To place the jack into the horizontal position,
allow about 2" (5 cm) of ground clearance beneath the wheels.
Pull the plunger pin out of the opening and swivel the jack.
Rotate either left or right until the plunger pin snaps into the
proper mounting bracket hole.